Oil-hole cap



April 8,1924- A. w. KAUF-MAN OIL HOLE CAP Filed June 22 1920 Patented Apr. 8, 1924.

UNITED STATES 1,489,441 IPATENT OFFICE.-

ADAM W; KAUFMAN, or MILWAUKEE, WISCONSIN, AssIGNoR 'ro MILWAUKEE Moron.

n PRODUCTS, INC., or MILWAUxEEWIsooNsIN, A CORPORATION or' WIscoNsIN.

OIL-HOLE CAI'.

Application Bled J'une22, 1920. Serial No. 390,747.

' To all whom t may concern.'

Be it known thatL I, ADAM W. KAUFMAN, a citizen of the United States, and resident'of Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented certain new and useful Improvements in Oil-Hole Caps; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention relates to closure device particularly adapted for use in connection with the oiling hole of a timer cap or casing, which timer cap is employed for advancing or retarding the spark mechanism of an internal combustion engine.

The general object of my invention is'VV to provide a closure for the oil hole embodying essentially a pair lof stampings one of which carries the oil hole and the other forms a lid having a slotted heel portion under spring control whereby a fixed pivot point for the cap is eliminated, toA thus simplify the constructionmaterially over such structures as are, to my knowledge, now in use.y Other objects are:

To provide a floating fulcrum point for` the cap closure.

To provide a leaf spring connectionA for the cap closure adapted to permit a slight oscillatory movement to the pintle point of said cap closure, both with respect to its ground engagement and lits spring engagement. A' I To provide co-related means between the cap closure and spring, wherebyvthe closure will swing practically in a fixed plane, without resorting to a fixed pintle means for said cap closure.

To provide a spring connection between the cap closure and base member, which serves to press the cap tightly about the oil hole, when said cap is in its closed position and which will hold the cap wide open, with relation to said oil hole, when it is swung in its open position.

With the above and other minor objects in view the invention consists in certain pecu liarities of construction and combination of parts as are herein setforth with reference to the accompanying drawings and subsequently claimed.

In the drawings- Figure 1 represents a sectional view through the closure device and associated f member.

parts., the cap being shown in its sealing position.

Figure 2 a similarfview of the cap in its full open position and Figure 3 a face view of the device, the same particularly shows the construction of the cap closure and its slotted h eel together with the spring which engages 1t.

Referring by characters to the drawing 5 designates a portion of the usual rotary casmg member of a timer, the same being provided with an'oil aperture 6.

A plate 7 constitutes a base member in connection with the casing, and is secured by rivets thereto. The base plate is 4provided with an opening 8, which is shown regis` tered with the oil opening 6 and in effect constitutes an extension of it. The plate 7 in this particular instance is formed with a rectangular aperture 9'oiset from the oil opening 8, which aperture is adapted to receivev the rectangular heel portion 10, of a closure cap 11, the heel portion of said closure cap being transversely slotted as indicated by the numeral 12.

The plate 7 is also provided with an upwardly` extended arm 13, having riveted thereto a sleeve 14, between a shoulder of which and the arm, the shank portion of a leafspring 15 is secured. This arm and associated sleeve constitutes a standard means for receiving a rod, whereby the casing as a whole is shifted to advance or retard the spark.

Asbest shown in Figures 1 and 2 the free Vend of the leaf spring 15 projects through the heel slot 12 and when the cap closure is in fits sealing position, the free end of said spring holds the said closure securely against its seat. Obviously when the cap closure is swung outwardly to its open position the spring will exert its force to hold the said cap closure open, due to the fact that a. contact point between the spring and heel of the closure has shifted beyond the initial engaging point of said cap closure and the base It will also be observed that the shifting arm sleeve, serves as a stop against which the cap closure contacts when swung open to thus limit the outward movement in such a position that the oil hole is clear of' any obstruction whereby access may be had thereto conveniently.

By this simple floating connection between the cap closure and spring it will be observed that the cap closure when actuated will have a limited movement in connection with its ground engaging surface and also a limited movement in connection with its spring engaging surface, but owing to the slotted heel and spring connection, the cap will be held in approximate alignment with its associated oil hole.

In this particular exemplitication of the invention I have illustrated the plate 7 as having an aperture 9 therein which aperture, to a certain extent, serves as a guideA for the heel end of the cap, to limit sideplay thereof, but obviously this slot may be dispensed with, in which case the spring and slotted connection of the cap may serve solely as the means for confining the cap, whereby it is capable of a swinging motion upon its fulcrum without the employment of fixed pintle points, which pintle points are undesirable due to cest in manufacture and their liabilities to become disarranged through use. I-Ience it is apparent that when the cap is swung from its closed to its open position, the heel or ground engaging surface will have a slight play relative to the base and likewise a slight play in relation to its slotted engagement with the spring. Thile I have shown and described a specific exempliiication of my invention it should be understood that I reserve all variations in structure within the scope of the claims as they would be interpreted by the skilled mechanic.

I claim:

l. A closure device of the class described comprising an apertured casing, an apertured base member having an arm extending upwardly therefrom, a closure cap for the base aperture having a heel extension adapted to bear upon said casing, the heel having a transverse slot, a leaf spring secured to the base member a m having its end projecting through the slot of the heel extension, the spring being in engagement with the lower edge of said slot to permit free swing of the cap upon its heel extension, whereby said heel will have limited play relative to its pressure spring and its bearing upon said casing.

2. A device of the class described comprising an apertured casing, a base having an aperture, a closure cap for the base aperture having a heel extension provided with a transversely disposed slot, the heel being adapted to bear upon said casing, and a spring carried by the base having its free end engageable with one edge of the heel slot to exert pressure thereon, whereby the cap is confined but loosely anchored to permit swing upon its heel portion having limited play relative to its casing engaging surface and its spring engaging surface.

3. A device of the character described comprising a casing having an aperture, a base member secured to the casing and having an aperture in register with the casing aperture, a closure cap for the base aperture having a heel extension provided with a transversely disposed slot, the heel adapted to bear upon said casing, and a spring carried by the base member having its free end engageable with one edge of the heel slot to exert pressure thereon and permit the swing of the cap upon its heel extension, wherelgiy said heel will have limited movement relative to the casing and to the spring in opposite directions during the swinging of the closure cap.

4C. A device of the character described coinprising a casing provided with an aperture, a base member secured to the casing having an arm extending upwardly therefrom, said base member having an oiling aperture in register with the casing aperture and having a stop aperture spaced therefrom toward said arm, a closure cap for the oiling aperture having a heel extension adapted to bear upon the. casing through said stop aperture, the hee-l having a transverse slot, a leaf spring secured to the base member arm having its end projecting through the slot of the heel extension, the spring being in engagement with the lower edge of said slot t o pcrniitfree swing of the closure cap upon its heel extension between opposite edges of the stop aperture, whereby said heel will have limited movement relative to the casing and to the spring in opposite directions during the swinging of the closure cap.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of IVisconsin.

ADAM XV. KAUFMAN. 

